The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Pyridine-3,5-dicarbonitrile( cas:1195-58-0 ) is researched.Safety of Pyridine-3,5-dicarbonitrile.Kuthan, J.; Musil, L.; Kohoutova, A. published the article 《Dihydropyridines. XXIV. Partial hydrogenation of some 3,5-dicyanopyridines》 about this compound( cas:1195-58-0 ) in Collection of Czechoslovak Chemical Communications. Keywords: pyridine dihydro dicyano. Let’s learn more about this compound (cas:1195-58-0).
Partial hydrogenation of 3,5-dicyanopyridine in EtOH over Pd on BaSO4 or BaCO3 gave a mixture of 3,5-dicyano-1,2-dihydropyridine and 3,5-dicyano-1,4-dihydropyridine. A similar hydrogenation of 3,5-dicyano-4-methylpyridine gave only the 1,2-dihydro derivative 3,5-Dicyano-2,6-dimethylpyridine and 3,5-dicyano-2,4,6-trimethylpyridine gave only traces of the 1,2- and 1,4-dihydro derivatives The mechanism of hydrogenation is discussed with the use of bicentric localization energies and simple Hueckel MO theory.
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